CVE-2021-40396

HIGH 8.8CVE-2021-40396 · Published 28/01/2022 · updated 17/06/2026

In short

CVE-2021-40396 is a HIGH (CVSS 8.8) vulnerability affecting deviceon/iservice (advantech).
Chance of exploitation in the next 30 days (EPSS): 0.36%, higher than 30.4% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
deviceon/iservice advantech	`= 1.1.7`	No fix yet

Description

A privilege escalation vulnerability exists in the installation of Advantech DeviceOn/iService 1.1.7. A specially-crafted file can be replaced in the system to escalate privileges to NT SYSTEM authority. An attacker can provide a malicious file to trigger this vulnerability.

References

talosintelligence.com/vulnerability_reports/TALOS-2021-1408 · Exploit

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